Quercus ilex browse utilization by Caprini in Sierra de Cazorla and Segura (Spain)

Cuartas, P.; Garc�a-G�nzalez, R.

doi:10.1007/bf00118239

Cited by 38 publications

(15 citation statements)

References 12 publications

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“…2). Shrubs in these Mediterranean environments constitute a primary food source for ungulates (Martínez 1988(Martínez , 1990(Martínez , 1995(Martínez , 1997García-González and Cuartas 1989, 1992a, 1992bFandós 1991;Cuartas and García-González 1992;Valderrábano and Torrano 2000). Indeed, ungulates at our study sites browsed on some types of shrubs more frequently Note: Nonsignificant interactions were pooled with the error terms to increase dfs.…”

Section: Discussionmentioning

confidence: 95%

“…In addition, mammalian herbivory is extremely frequent in Mediterranean habitats, most being overgrazed and overbrowsed . Finally, the Mediterranean mammalian herbivores are generalists, consuming disparate types of herbs and shrubs (Martínez 1988(Martínez , 1990(Martínez , 1995García-González and Cuartas 1989, 1992a, 1992bFandós 1991;Cuartas and García-González 1992), often resulting in serious damage to Mediterranean woody plants (Cuartas and García-González 1992;Bartolomé et al 1998).…”

Section: Introductionmentioning

confidence: 99%

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Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs

Gómez¹,

Hódar²,

Zamora³

et al. 2001

Can. J. Bot.

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Abstract:The spatial structure of plant communities as well as the quality and abundance of neighbours can strongly influence the intensity of herbivory suffered by a plant. In this paper, we study the effect of the association with shrubs on the ungulate herbivory suffered by Scots pine (Pinus sylvestris var. nevadensis Christ., Pinaceae) saplings in two isolated, fragmented populations in southeastern Spain. For this, we monitored herbivory on saplings with regard to the microhabitat in which they grew. We distinguished pines growing in open interspaces, on the edge of shrubs and within the canopy of shrubs, and also we distinguished four functional types of shrubs: thorny shrubs, nonthorny shrubs, thorny scrubs, and nonthorny scrubs. Our results show that association with shrubs increases the damage inflicted on Scots pine saplings. In fact, saplings growing in the open patches, far from the shrubs, escaped from herbivory more frequently and incurred less damage than did saplings growing close to shrubs. However, herbivory was also reduced when pine saplings were completely surrounded by shrubs, since then they served as a mechanical barrier. The type of neighbouring shrub did not affect the overall damage suffered by pines, despite the fact that the ungulates damaged the nonthorny scrubs more intensely than the other kinds of shrubs. Consequently, saplings have an advantage when growing within the canopy of shrubs; these constitute key microsites for pine recruitment in these Mediterranean forests.Key words: associational resistance, associational susceptibility, mammalian herbivory, Mediterranean high mountain, neighbouring effects, Pinus sylvestris var. nevadensis.Résumé : La structure spatiale des communautés végétales ainsi que la qualité et l'abondance des voisins peuvent fortement influencer l'intensité de l'herbivorie subie par les plantes. Les auteurs ont étudié l'effet de l'association avec des arbustes sur l'herbivorie subie de la part des ongulés par de jeunes plants de pin sylvestre (Pinus sylvestris var. -nevadensis Christ., Pinaceae) dans deux populations isolées et fragmentées du sud-est de l'Espagne. A cette fin, ils ont suivi l'herbivorie chez les jeunes plants en relation avec le microhabitat où ils poussent. Ils ont distingué les pins poussant dans les espaces ouverts, près d'arbustes et sous la canopée des arbustes, et ont également identifié 4 types fonctionnels d'arbustes : arbustes épineux, arbustes non-épineux, rebuts (scrubs) épineux, rebuts non-épineux. On observe que l'association avec les arbustes augmente le dommage subi par les jeunes plants de pin sylvestre. En fait, les jeunes plants poussant dans les espaces ouverts, loin des arbustes, échappent à l'herbivorie plus souvent et subissent moins de dommages que les jeunes plants poussant près des arbustes. Cependant, l'herbivorie est également réduite lorsque les jeunes plants de pin sont complètement entourés d'arbustes, qui servent alors de barrière mécanique. Le type d'arbuste avoisinant n'affecte pas les dommages en général s...

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs

Gómez¹,

Hódar²,

Zamora³

et al. 2001

Can. J. Bot.

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“…For example, fallow deer (Dama dama) preference in UK can change dominance from Fraxinus to Populus. Similarly, in Spain grazing by sheep and domestic goats can change patterns of woody species composition, diversity, and biomass (Cuartas and García-González 1992).…”

Section: Managementmentioning

confidence: 99%

Confounding Factors in the Observational Productivity-Diversity Relationship in Forests

Vilà¹,

Inchausti²,

Vayreda³

et al.

Ecological Studies

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“…It remains unclear whether this preferential browsing of the deciduous oak is caused by the behavior of herbivores or by structural or chemical differences between species that reduce browsing intensity (i.e. lower nitrogen content and higher sclerophylly of leaves of evergreen oaks compared to deciduous ones; [7,12,21,26,29]. Some authors have noted that domestic herbivores are less selective than wild ones, and they browse more of the larger (Q. cerrioides in our study) or dominant plants [25,48].…”

Section: Discussionmentioning

confidence: 99%

“…Finally, it has been frequently presumed that evergreen species would be more resilient to repeated disturbances because their lower resource-loss ratios [1] would allow them to be better adapted to harsh environments (e.g., high water stress, temperature and light intensity) occurring in repeatedly disturbed sites ( [32,37], but see [5]). Taking into account the abovementioned differences, some authors have suggested the idea that the greater dominance of evergreen oaks in the Mediterranean Basin in comparison to deciduous ones has been partially favored by occurrence of repeated disturbances, including the impact of domestic herbivores [12]. However, we do not know at present any study specifically aimed to test whether deciduous and evergreen oaks resprouting after fire differ in their sensitivity to browsing and to test whether differences between these species depend on the season when browsing occurs.…”

Section: Introductionmentioning

confidence: 99%

Response to natural and simulated browsing of two Mediterranean oaks with contrasting leaf habit after a wildfire

2006

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-In this study, we explore the response to browsing of two co-occurring Mediterranean oaks, the evergreen Quercus ilex and the deciduous Quercus cerrioides, resprouting in areas affected by large wildfires in central Catalonia (NE Spain). We tested three hypotheses: (i) differences in the preference of browsers will cause a higher impact of browsing on the deciduous oak, (ii) the deciduous oak will show a lower response to browsing than the evergreen one, and (iii) the response to browsing of Q. ilex and Q. cerrioides will differ depending on the season of the year when browsing occurs. To test the first hypothesis, we undertook the monitoring of the degree of browsing on resprouting evergreen and deciduous oaks after fire, while the second and third hypothesis were tested by mean of an experiment with different intensities of simulated browsing in different seasons of the year. The results indicate that Q. cerrioides individuals were more heavily browsed than Q. ilex ones. Moreover, browsing matched the two species in most of the size variables considered, cancelling the advantage in height and crown projection of the deciduous oak at the beginning of the resprouting process. In the experiment of simulated browsing, Q. ilex and Q. cerrioides showed a similar response to the different intensities of simulated browsing applied, but differences between species occurred depending on the season of the year when browsing occurred: Q. ilex showed a higher growth rate of crown projection than Q. cerrioides when it was browsed in autumn and winter, while the opposite pattern was obtained when stumps browsing occurred in spring and summer.deciduous / evergreen / post-fire regeneration / Quercus ilex / Quercus cerrioides / succession Résumé -Réponse à l'abroutissement après un incendie de forêt de deux chênes méditerranéens à feuillages contrastés. Dans cette étude, on a exploré la réponse de deux chênes méditerranéens, se rencontrant ensemble, Quercus ilex sempervirent et Quercus cerrioides caducifolié, rejetant dans de grandes zones affectées par des incendies de forêt dans le centre de la Catalogne. On a testé trois hypothèses : (i) des différences de préfé-rence des animaux broutants causeront un impact très important sur le chêne caducifolié, (ii) le chêne caducifolié montrera une plus faible réponse à l'abroutissement que le chêne sempervirent, et (iii) les réponses à l'abroutissement de Quercus ilex et Quercus cerrioides diffèreront en relation avec la saison pendant laquelle l'abroutissement se produit. Pour tester la première hypothèse, nous avons entrepris de suivre le degré d'abroutissement sur les chênes sempervirents et les chênes caducifoliés rejetant après incendie, tandis que la deuxième et la troisième hypothèse étaient testées au moyen d'une expérimentation avec différents niveaux d'un abroutissement simulé pendant différentes saisons de l'année. Les résultats indiquent que Quercus cerrioides était plus fortement abrouti que Quercus ilex. D'ailleurs, l'abroutissement a assorti les deux espèces d...

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Quercus ilex browse utilization by Caprini in Sierra de Cazorla and Segura (Spain)

Cited by 38 publications

References 12 publications

Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs

Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs

Confounding Factors in the Observational Productivity-Diversity Relationship in Forests

Response to natural and simulated browsing of two Mediterranean oaks with contrasting leaf habit after a wildfire

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